Global Patent Index - EP 0907148 A3

EP 0907148 A3 2000-02-23 - Computer graphics hardware for lighting effects

Title (en)

Computer graphics hardware for lighting effects

Title (de)

Rechnergrafiksystem zur Erzeugung von Belichtungseffekten

Title (fr)

Système graphique par ordinateur pour generer des effets lumineux

Publication

EP 0907148 A3 (EN)

Application

EP 98307508 A

Priority

JP 25102497 A

Abstract (en)

[origin: EP0907148A2] Ray casting method is performed using a hardware. Ray casting is performed on a 3D object formed in a three-dimensional array of voxels, luminance information is generated for each unit ray path based on voxel information assigned to the voxels on the ray path, and an image related to the 3D object are generated based on the luminance information. At this time, pattern information representing a pattern of the ray paths is previously stored in a branch point table memory (14). A memory control section (16) determines ray paths for generating the luminance information based on the pattern information. <IMAGE>

IPC 1-7

G06T 15/50

IPC 8 full level

G06T 15/08 (2011.01)

CPC

G06T 15/55 (2013.01); G06T 15/06 (2013.01)

Citation (search report)

  • [X] US 5101475 A 19920331 - KAUFMAN ARIE E [US], et al
  • [X] US 5313567 A 19940517 - CIVANLAR M REHA [US], et al
  • [A] WO 9607989 A1 19960314 - UNIV NEW YORK STATE RES FOUND [US]
  • [A] WO 9617326 A1 19960606 - ADVANCED RENDERING TECHNOLOGY [GB], et al
  • [A] PFISTER H ET AL: "CUBE-4 - A SCALABLE ARCHITECTURE FOR REAL-TIME VOLUME RENDERING", PROCEEDINGS OF THE SYMPOSIUM ON VOLUME VISUALIZATION,US,NEW YORK, IEEE/ACM, 28 October 1996 (1996-10-28), pages 47-54, XP000724429, ISBN: 0-89791-865-7
  • [A] KANUS U ET AL: "Implementations of cube-4 on the teramac custom computing machine", COMPUTERS AND GRAPHICS,GB,PERGAMON PRESS LTD. OXFORD, vol. 21, no. 2, March 1997 (1997-03-01), pages 199-208, XP004064048, ISSN: 0097-8493
  • [A] DE BOER M ET AL: "Latency- and hazard-free volume memory architecture for direct volume rendering", COMPUTERS AND GRAPHICS,GB,PERGAMON PRESS LTD. OXFORD, vol. 21, no. 2, March 1997 (1997-03-01), pages 179-187, XP004064046, ISSN: 0097-8493

DCS

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0907148 A2 19990407; EP 0907148 A3 20000223; EP 0907148 B1 20030226; CA 2246952 A1 19990316; DE 69811591 D1 20030403; DE 69811591 T2 20031120; JP 3073943 B2 20000807; JP H1196389 A 19990409; KR 19990029779 A 19990426; US 6191789 B1 20010220